大地测量与地球动力学2011，Vol.31Issue(5)：14-19,6.
用超长基线解算分析汶川地震动态形变特征
USING ULTRA LONG BASELINE TO MEASURE CO-SEISMIC KINEMATIC DEFORMATIONS OF WENCHUAN EARTHQUAKE
摘要
Abstract
We used Wuhan, one of IGS stations, as a reference to form ultra long baseline and solve instantaneous 1-Hz-GPS positions and measure the co-seismic kinematic deformations caused by Wenchuan earthquake. Compared with the results from using Yaan as the reference which is nearby 1 -Hz-GPS stations, the deformation solutions show good consistence with different reference stations. The maximum deformation amplitude is found for station Pixian, which had the largest deformation about 1.034 meter. The deformations of stations, such as Pixian, Chengdu, Mianyang, Zhongjiang are relatively larger and also show the propagation direction of seismic waves. The smaller deformations occurred in Qionglai, Yaan, in the south of the epicenter, which indicate that the fault ruptured from the epicenter to the northeast. On the basis of the arrival time of seismic wave recorded in kinematic time series and the distance between 1 -Hz-GPS stations and the epicenter, the estimated average velocity of seismic wave in the crust is 3.1 km/s.关键词
超长基线/双差定位/汶川地震/高采样率GPS/动态形变特征Key words
ultra long baseline/double-difference positioning/Wenchuan earthquake/high-rate GPS/kinematic de-formation feature分类
天文与地球科学引用本文复制引用
刘刚,谭凯,彭懋磊,聂兆生..用超长基线解算分析汶川地震动态形变特征[J].大地测量与地球动力学,2011,31(5):14-19,6.基金项目
国家自然科学基金(40974012) （40974012）
中国地震局地震研究所科技发展基金(IS200726005) （IS200726005）
